[Bjartr]

Why must there be a way?

A few notes: * There's no such thing as "absolute hot" state that meansno more heat can be added * Blackbody radiation means that above a certain temperature, regardless of what you make your mirror out of, it will be spontaneously emitting visible light at all times.

[lukan]

Indeed. There is only an absolute zero, that cannot get colder, but more heat is always possible as more heat means more rapid movement of elements. While absolute zero at 0 K means no movement.